PLATE OXIIIa. 



Fig. 



1. Amphitrite figulus, Dalyell. Slightly enlarged. 



2. Dorsal view of Lanice conchilega, Pallas, from St. Andrews. Enlarged under a lens, 

 2 a. Ventral view of the anterior region. Enlarged under a lens. 



2 b. Lateral view of the anterior region. Enlarged under a lens. 



3. Poly cirrus medusa, Grrube. Enlarged under a lens. 



4. Amphiglena mediterranean Leydig, from the ventral surface. Enlarged. 



5. Lateral view of a pale variety of Dasychone argus, Sars. Enlarged. 



